This soundfont:
http://dl.dropbox.com/u/323556/RealFont_2_1.7z
Plus this midi file:
https://sites.google.com/site/metaruka/GameGame/01Game-Game.mid?attredirects=0
produces sound like this on 64-bit system:
http://dl.dropbox.com/u/323556/test.ogg
however on 32-bit system it sounds normal:
http://www.archive.org/download/Game-gameOst/01Game-game.ogg
Fluidsynth 1.1.3. Commandline to hear the results:
fluidsynth -i -l -r 48000 -a alsa RealFont_2_1.sf2 01Game-Game.mid
Discussed in the mailing list here:
http://lists.nongnu.org/archive/html/fluid-dev/2010-10/msg00101.html
Reported by: maxstack
Original Ticket: fluidsynth/tickets/91